Cambridge Year 8 Science: Strength of Electromagnets | Scientific Investigation

Cambridge Year 8 Science: Strength of Electromagnets | Scientific Investigation

Explore what makes an electromagnet stronger with this hands-on Cambridge Year 8 Electricity & Magnetism investigation. Students investigate how number of wire turns, current, and core material affect electromagnet strength while learning how to plan and conduct a controlled scientific investigation.

Designed for Grades 6–8 and approximately 1–2 × 45–60 minute classes, students research, plan a fair test, collect repeated measurements, calculate averages, graph results, and draw evidence-based conclusions.

What’s Included
- Teacher directions and lesson flow
- Strength of Electromagnets overview + mini research questions
- Group Scientific Investigation
- 3 student investigation worksheets
- Results, analysis, conclusions, and evaluation
- 9-task Early Finisher / Extension Choice Board
- Colour + printer-friendly black-and-white student pages

Students Will
- Explore how number of turns, current, and core material affect electromagnet strength
- Identify independent, dependent, and control variables
- Plan and conduct a fair test
- Measure strength by counting lifted paperclips
- Complete at least 3 trials for each test setting
- Calculate averages and record quantitative data
- Present results in a table and bar chart
- Identify patterns and use evidence to draw conclusions
- Evaluate reliability, errors, and possible improvements
- Apply their understanding to powerful real-world electromagnets such as scrapyard cranes

Why Teachers Love This Resource
- Combines physics + scientific inquiry + data skills
- Provides a structured investigation from prediction to conclusion
- Reinforces fair testing and experimental variables
- Develops graphing, averaging, analysis, and scientific reasoning
- Includes built-in differentiation and extension opportunities
- Works well with pairs or small groups
- Includes both colour and black-and-white versions

Cambridge Disclaimer
This resource is an independent educational product created by GR Creative Creations. It is not created by, affiliated with, endorsed by, sponsored by, or officially connected to Cambridge University Press & Assessment, Cambridge Assessment International Education, or the Cambridge Lower Secondary Science programme.
References to Cambridge Lower Secondary Science are used strictly for curriculum-alignment purposes. This resource is designed to support commonly taught learning objectives, skills, and scientific practices associated with Cambridge Lower Secondary Science frameworks. It is not an official Cambridge curriculum document, assessment, publication, or approved instructional material.